【摘要】 本文分析了Fe73.5Cu1Nb3Si13.5B9晶丝在内径为1.75mm、0.4mm、0.1mm线圈纵向驱动和环向驱动下的巨磁阻抗效应,发现在环向驱动下,当驱动频率为1.925×107Hz时,磁致阻抗变化最大值为:(Z(H)-Z(Hmax))/Z(Hmax)×100%=14.24135%。在纵向驱动下铁基纳米晶丝的巨磁阻抗效应与驱动线圈的内径有关,内径越小,阻抗效应越大,用内径为1.75mm线圈驱动时,(Z(H)-Z(Hmax))/Z(Hmax)×100%=18.54342%;用内径为0.4mm线圈驱动时,(Z(H)-Z(Hmax))/Z(Hmax)×100%=104.91793%;用内径为0.1mm线圈驱动时,(Z(H)-Z(Hmax))/Z(Hmax)×100%=140.56741%。实验结果表明,纵向驱动比环向驱动磁阻抗变化效果明显。更多还原

【Abstract】 The thesis analyzes the giant megnetoimpedance effect(GMI) of Fe-based nanocrystalline wire which is driven vertically or circularly by the coil of internal diameter(ID 1.75mm,0.4mm,0.1mm),and discovers that being driven circularly,the driving frequency is1.925×107HZ,and GMI is(Z(H)-Z(Hmax))/Z(Hmax) ×100%)=14.24135%;while vertically,the GUI is interrelated to the driving coil.The smaller the ID is,the bigger the GMI,as:ID=1.75mm,(Z(H)-Z(Hmax))/Z(Hmax)×100%=18.54342%;ID=0.4mm,(Z(H)-Z(Hmax))/Z(Hmax)×100%=104.91793%;ID=0.1mm,(Z(H)-Z(Hmax))/Z(Hmax)×100%=140.56741%.It concludes that GMI of Fe-based nanocrystalline driven circulary has clear superiority to vertically driven.更多还原